Displaying 4 results from an estimated 4 matches for "xyvalues".
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2010 Jul 02
2
S4 classes and debugging - Is there a summary?
...ch doesn't really help in easily
finding the bit of code you're interested in.
Getting the code with getAnywhere() doesn't always work. Debug()
doesn't work. Using trace() and browser() is not an option, as I can't
find the correct method.
eg :
library(raster)
> getAnywhere(xyValues)
A single object matching ?xyValues? was found
It was found in the following places
package:raster
namespace:raster
with value
standardGeneric for "xyValues" defined from package "raster"
function (object, xy, ...)
standardGeneric("xyValues")
<environment: 0x0...
2010 Aug 26
1
Passing arguments between S4 methods fails within a function:bug? example with raster package.
...his problem came up initially while debugging a function, but it
seems to be a more general problem of R. I hope I'm wrong, but I can't
find another explanation. Let me illustrate with the raster package.
For an object "RasterLayer" (which inherits from Raster), there is a
method xyValues defined with the signature
(object="RasterLayer",xy="matrix"). There is also a method with
signature (object="Raster",xy="vector"). The only thing this method
does, is change xy into a matrix and then pass on to the next method
using callGeneric again. Argume...
2010 Aug 26
1
my function decided to stop working, problem with scoping?
Hello list.
Until last week, I've been using my function without a problem. I can only
imagine what has changed (no package updates), but all of a sudden, a custom
function that uses raster::xyValues stopped working. For some reason, one of
the values is not found, even though it's there. Here is a snippet of code
from browser() call from within my custom function where everything goes
awry.
Browse[1]> effect.distance
[1] 220.2045 # just to make sure effect.distance is there
Browse[1]&...
2012 Sep 18
1
extracting values
Hi all,
I 'm doing the exercise given in the 'SDM with R' (Robert J. Hijmans and Jane Elith), chapter 4.2, regarding extracting values . I tried to do the same using my own data as well. Each cases i received the following error message ;
"Error in .xyValues(x, as.matrix(y), ...) : xy should have 2 columns only.
Found these dimensions:
Can some body explain me how to get rid of that? Thanks in advance.
champika
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